Point-to-multipoint shared-access full-duplex wireless duplexing scheme associated with spatial diversity

Abstract

A wireless communication network for communicating information between a base station and a plurality of UEs is described. In accordance with a first aspect the base station concurrently transmits to and receives from a plurality of UEs using a spatial diversity and a frequency division multiplexing, FDM, communication. In accordance with a second aspect the base station concurrently transmits to and receives from a plurality of UEs using a frequency division multiplexing, FDM, communication without spatial diversity. In accordance with a third aspect the base station concurrently transmits to and receives from a plurality of UEs using a spatial diversity and a time division multiplexing, TDM, communication. In accordance with a fourth aspect the base station concurrently transmits to and receives from a plurality of UEs a time division multiplexing, TDM, communication without spatial diversity, and wherein the UEs employ beamforming for inter-UE-interference suppression.

1 . A wireless communication system, comprising:
 a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE,   at least one base station, the base station configured to serve the plurality of UEs,   wherein the base station is configured to
 provide a plurality of beams or spatial links for a wireless communication with the plurality of UEs, the plurality of beams comprising at least a first beam or spatial link for a wireless communication with the first UE and a second beam or spatial link for a wireless communication with the second UE, 
 transmit to the first UE on the first beam or spatial link using frequency resources within a DL frequency band, 
 transmit to the second UE on the second beam or spatial link using frequency resources within the DL frequency band, wherein the DL frequency band and a UL frequency band overlap at least partially, the overlapping parts of the DL frequency band and the UL frequency band defining an overlapping frequency band, 
 concurrently transmit and receive in the overlapping frequency band, and 
 cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the overlapping frequency band, and 
   wherein the first UE and the second UE are configured to transmit to and receive from the base station using respective frequency resources in the overlapping frequency band.   
     
     
         2 . The wireless communication system of  claim 1 , wherein the frequency resources used by the first UE and the second UE for a transmission to and a reception from the base station comprise one or more sub-bands or one or more sub-carriers. 
     
     
         3 . The wireless communication system of  claim 1 , wherein, for transmitting to the base station, the first UE is configured to transmit to the base station using a first UL sub-band of the overlapping frequency band, and the second UE is configured to transmit to the base station using a second UL sub-band of the overlapping frequency band, the first and second UL sub-bands comprising the same or different bandwidths. 
     
     
         4 . The wireless communication system of  claim 1 , wherein
 no signal cancellation is implemented at the first UE and at the second UE to cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the base station in the overlapping frequency band, and   the first UL sub-band and the second UL sub-band do not overlap.   
     
     
         5 . The wireless communication system of  claim 1 , wherein
 signal cancellation is implemented in the first UE to cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the base station in the overlapping frequency band, and   the first UL sub-band spans the overlapping frequency band.   
     
     
         6 . The wireless communication system of  claim 5 , wherein the first UE is configured to form a narrow beam towards the base station. 
     
     
         7 . The wireless communication system of  claim 1 , wherein for transmitting to the base station, the first UE is configured to transmit to the base station using a plurality of first UL subcarriers of the overlapping frequency band, and the second UE is configured to transmit to the base station using a plurality of second UL subcarriers of the overlapping frequency band, the first and second UL subcarriers being different. 
     
     
         8 . The wireless communication system of  claim 1 , comprising:
 at least one further UE served by the base station and located with respect to the first UE such that an interference level between the first UE and the further UE is below a threshold,   wherein the plurality of beams or spatial links provided by the base station comprises at least one further beam or spatial link for a wireless communication with the further UE, and   wherein, for transmitting to the base station, the further UE is configured to transmit to the base station using the first UL sub-band or the plurality of first UL subcarriers of the overlapping frequency band.   
     
     
         9 . The wireless communication system of  claim 1 , wherein the base station is configured to discriminate an UL transmission from the first UE and an UL transmission from the further UE on the spatial properties of the respective UL transmissions. 
     
     
         10 . The wireless communication system of  claim 1 , comprising at least one further UE served by the base station,
 wherein the base station is configured to provide the first beam or spatial link for a wireless communication with the first UE and with the further UE,   wherein the base station is configured to transmit to the first UE using a first DL subband of the DL frequency band, and transmit to the further UE using a further DL subband of the DL frequency band,   wherein the first UE is configured to transmit to the base station using a first UL subband in the overlapping frequency band, the first UL subband selected such a signal in the first DL subband is successfully received by the first UE, and   wherein the further UE is configured to transmit to the base station using a further UL subband in the overlapping frequency band, the further UL subband selected such a signal in the further DL subband is successfully received by the further UE.   
     
     
         11 . The wireless communication system of  claim 10 , wherein the first DL sub-band and the first UL sub-band do not overlap each other, and the further DL sub-band and the further UL sub-band do not overlap each other. 
     
     
         12 . The wireless communication system of  claim 11 , wherein signal cancellation is implemented in the first and/or in the further UE to cancel at least a portion from the transmit power of one or more transmission signals at least in presence of one or more concurrent receive signals from the base station in the overlapping frequency band. 
     
     
         13 . The wireless communication system of  claim 10 , wherein
 signal cancellation is implemented in the first and/or in the further UE to cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the base station in the overlapping frequency band, and   the first DL sub-band and the first UL sub-band and/or the further DL sub-band and the further UL sub-band overlap each other.   
     
     
         14 . A wireless communication system, comprising:
 a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE,   at least one base station, the base station configured to serve the plurality of UEs,   wherein the base station is configured to
 transmit to the first UE using a first DL subband of the DL frequency band, 
 transmit to the second UE using a second DL subband of the DL frequency band, wherein the DL frequency band and a UL frequency band overlap at least partially, the overlapping parts of the DL frequency band and the UL frequency band defining an overlapping frequency band, 
 concurrently transmit and receive in the overlapping frequency band, and 
 cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the overlapping frequency band, 
   wherein the first UE and the second UE are configured to transmit to the base station using respective subbands in the overlapping frequency band,   wherein the first UE is configured to transmit to the base station using a first UL subband in the overlapping frequency band, the first UL subband selected such a signal in the first DL subband is successfully received by the first UE, and   wherein the second UE is configured to transmit to the base station using a second UL subband in the overlapping frequency band, the second UL subband selected such a signal in a second DL subband is successfully received by the second UE.   
     
     
         15 . The wireless communication system of  claim 14 , wherein the first DL sub-band and the first UL sub-band do not overlap each other, and the second DL sub-band and the second UL sub-band do not overlap each other. 
     
     
         16 . The wireless communication system of  claim 14 , wherein signal cancellation is implemented in the first and/or in the further UE to cancel at least a portion from the transmit power of one or more transmission signals at least in presence of one or more concurrent receive signals from the base station in the overlapping frequency band. 
     
     
         17 . The wireless communication system of  claim 14 , wherein
 signal cancellation is implemented in the first and/or in the second UE to cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the base station in the overlapping frequency band, and   the first DL sub-band and the first UL sub-band and/or the second DL sub-band and the second UL sub-band overlap each other.   
     
     
         18 . The wireless communication system of  claim 1 , wherein the wireless communication system is configured to control the UEs so as to permutate the allocation of the first and second UL sub-bands in a coordinated manner such that the first and second UL sub-bands do not occupy the same frequency band at the same time. 
     
     
         19 . The wireless communication system of  claim 18 , wherein the base station is configured to estimate the channel for at least a part of the DL frequency band after a successful scan of the respective UL sub-band. 
     
     
         20 . The wireless communication system of  claim 1 , wherein the first UL sub-band and the second UL sub-band are offset from each other by a free sub-band, and wherein the first and second UEs are configured to receive from the base station in the free sub-band. 
     
     
         21 . The wireless communication system of  claim 1 , wherein the first UL sub-band and the second UL sub-band overlap each other, and wherein the first and second UEs are configured to receive from the base station in a free subband of the overlapping frequency band. 
     
     
         22 . The wireless communication system of  claim 1 , wherein
 the first UE comprises a plurality of antennas or an antenna array, the first UE configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a radiation towards the base station is stronger than a radiation towards the second UE, and/or   the second UE comprises a plurality of antennas or an antenna array, the second UE configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a radiation towards the base station is stronger than a radiation towards the first UE.   
     
     
         23 . The wireless communication system of  claim 22 , wherein
 the first UE is configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a null is directed towards the second UE, and/or   wherein the second UE is configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a null is directed towards the first UE.   
     
     
         24 . The wireless communication system of  claim 22 , wherein the base station is configured to
 receive from the first UE a first interference level caused by the second UE, and/or from the second UE a second interference level caused by the first UE, and   control, responsive to the received first and/or second interference levels, the first and/or second UEs to set the receive beam pattern and/or the transmit beam pattern of the antenna accordingly.   
     
     
         25 . The wireless communication system of  claim 22 , wherein the first UL sub-band and the second UL sub-band partially or fully overlap each other. 
     
     
         26 . The wireless communication system of  claim 1 , wherein the base station is configured to provide for
 a full spectral occupancy so as to transmit to the UEs on the entire overlapping frequency band on each of the beams or spatial links or on a sub-set of the beams or spatial links, or   a partial spectral occupancy so as to transmit to the UEs on one or more DL sub-bands within the overlapping frequency band on each of the beams or spatial links or on a sub-set of the beams or spatial links.   
     
     
         27 . The wireless communication system of  claim 26 , wherein the base station is configured to remove a sub-band from the DL allocated band, the removed sub-band being chosen to avoid any overlap with a UL sub-band. 
     
     
         28 . The wireless communication system of  claim 1 , wherein signal cancellation is implemented at the first UE and/or at the second UE to cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the base station in the overlapping frequency band. 
     
     
         29 . The wireless communication system of  claim 28 , wherein the UEs are configured to report to the base station the partial SIC capability, and the base station is configured to unallocate a sub-band from the DL band where the UL sub-band is allocated. 
     
     
         30 . The wireless communication system of  claim 1 , wherein the DL frequency subbands are separated by a frequency guard band, and wherein the UL frequency subbands are separated by a frequency guard band. 
     
     
         31 . A wireless communication system, comprising:
 a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE,   at least one base station, the base station configured to serve the plurality of UEs,   wherein the first UE and the second UE are configured to transmit to and receive from the base station using time resources within a TDD frequency band,   wherein the base station is configured to
 provide a plurality of beams or spatial links for a wireless communication with the plurality of UEs, the plurality of beams comprising at least a first beam or spatial link for a wireless communication with the first UE and a second beam or spatial link for a wireless communication with the second UE, 
 transmit to the first UE on the first beam or spatial link using one or more first DL time resources in the TDD frequency band, 
 transmit to the second UE on the second beam or spatial link using one or more second DL time resources in the TDD frequency band, 
 concurrently transmit and receive in the TDD frequency band, and 
 cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the TDD frequency band, and 
   wherein the first UE is configured to transmit to the base station using one or more first UL time resources in the TDD frequency band, a first UL time resource overlapping at least partially a second DL time resource in the TDD frequency band, and   wherein the second UE is configured to transmit to the base station using one or more second UL time resources in the overlapping frequency band, a second UL time resource overlapping at least partially a first DL time resource in the TDD frequency band.   
     
     
         32 . The wireless communication system of  claim 31 , wherein the time resources used by the first UE and the second UE for a transmission to and a reception from the base station comprise one or more time slots. 
     
     
         33 . The wireless communication system of  claim 31 , wherein no signal cancellation is implemented at the first UE and at the second UE to cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the base station in the TDD frequency band. 
     
     
         34 . The wireless communication system of  claim 31 , wherein
 the first UE comprises a plurality of antennas or an antenna array, the first UE configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a radiation towards the base station is stronger than a radiation towards the second UE, and/or   the second UE comprises a plurality of antennas or an antenna array, the second UE configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a radiation towards the base station is stronger than a radiation towards the first UE.   
     
     
         35 . The wireless communication system of  claim 34 , wherein
 the first UE is configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a null is directed towards the second UE, and/or   wherein the second UE is configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a null is directed towards the first UE.   
     
     
         36 . The wireless communication system of  claim 35 , wherein
 the first and second UEs are configured to
 estimate an inter-UE-interference channel between the first and second UEs, e.g., through listening to an interference signal, like pilots in the inter-UE-interference channel, and 
 exchange information about the estimated inter-UE-interference channel, 
   the first and second UEs may be configured to communicate with each other using a direct communication channel, like a sidelink channel, and   the information about the estimated inter-UE-interference channel is communicated or transferred via the direct communication channel and/or via the base station.   
     
     
         37 . The wireless communication system of  claim 36 , wherein the first and second UEs are configured to trigger an inter-UE-interference channel estimation updating procedure responsive to a change of an inter-UE interference level exceeding a threshold. 
     
     
         38 . The wireless communication system of  claim 31 , wherein the base station is configured to allocate the same resources to the first and second UEs in case an inter-UE-interference level between the first UE and the second UE is below a threshold. 
     
     
         39 . The wireless communication system of  claim 38 , wherein the first and second UEs are located at a distance, wherein the distance
 is a distance at which the inter-UE-interference level between the first UE and the second UE is below a threshold, and/or   is a distance at which a pathloss between the UEs is above a threshold, and/or   is a long haul among the UEs, which assures that each UE's UL time slot attenuates enough, e.g., due to the wireless channel pathloss, before the UE's UL time slot reaches the other UE and interferes with the other UE's DL time slot.   
     
     
         40 . The wireless communication system of  claim 31 , wherein
 for receiving from the base station, the first and second UEs are configured to receive
 in alternating, non-overlapping first and second DL time slots, and/or 
 in a plurality of consecutive first and second DL time slots separated by one or more time slots, wherein the plurality of consecutive first and second DL time slots may overlap or not, and 
   for transmitting to the base station, the first and second UEs are configured to transmit
 in alternating, non-overlapping first and second UL time slots, or 
 in non-overlapping first and second UL time slots separated by two or more time slots. 
   
     
     
         41 . The wireless communication system of  claim 31 ,
 wherein at least one further UE served by the base station using the first beam or spatial link,   wherein, for receiving from the base station, the first UE and the further UE are configured to receive on different first DL time slots, and   wherein, for transmitting to the base station, the first UE is configured to transmit to the base station using a first UL time slot, and the further UE is configured to transmit to the base station using a second UL time slot, wherein the DL and UL time slots do not overlap.   
     
     
         42 . The wireless communication system of  claim 31 , wherein the base station is configured to implement receive beamforming to discriminate the UEs' UL. 
     
     
         43 . A wireless communication system, comprising:
 a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE, and each UE comprising a plurality of antennas or an antenna array comprising a plurality of antenna elements;   at least one base station, the base station configured to serve the plurality of UEs,   wherein the first UE and the second UE are configured to transmit to and receive from the base station using a TDD frequency band, and   wherein the base station is configured to
 transmit to the first UE using one or more first DL time slots in the TDD frequency band, 
 transmit to the second UE using one or more second DL time slots in the TDD frequency band, 
 concurrently transmit and receive in the TDD frequency band, and 
 cancel one or more transmission signals at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the TDD frequency band, 
   wherein the first UE is configured to transmit to the base station using one or more first UL time slots in the TDD frequency band, a first UL time slot overlapping at least partially a second time slot in the TDD frequency band,   wherein the second UE is configured to transmit to the base station using one or more second UL time slots in the TDD frequency band, a second UL time slot overlapping at least partially a first time slot in the TDD frequency band, and   wherein the first UE comprises a plurality of antennas or an antenna array, the first UE configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a radiation towards the base station is stronger than a radiation towards the second UE, and/or wherein the second UE comprises a plurality of antennas or an antenna array, the second UE configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a radiation towards the base station is stronger than a radiation towards the first UE.   
     
     
         44 . The wireless communication system of  claim 43 , wherein
 the first UE is configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a null is directed towards the second UE, and/or   wherein the second UE is configured to control the antennas or the antenna array so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a null is directed towards the first UE.   
     
     
         45 . The wireless communication system of  claim 43 , wherein
 the first and second UEs are configured to
 estimate an inter-UE-interference channel between the first and second UEs, e.g., through listening to an interference signal, like pilots in the inter-UE-interference channel, 
 exchange information about the estimated inter-UE-interference channel, and 
   the first and second UEs may be configured to communicate with each other using a direct communication channel, like a sidelink channel, and   the information about the estimated inter-UE-interference channel is communicated or transferred via the direct communication channel and/or via the base station.   
     
     
         46 . The wireless communication system of  claim 45 , wherein the first and second UEs are configured to trigger an inter-UE-interference channel estimation updating procedure responsive to a change of an inter-UE interference level exceeding a threshold. 
     
     
         47 . The wireless communication system of  claim 31 , wherein the base station is configured to discriminate an UL transmission from the first UE and an UL transmission from the further UE on the spatial properties of the respective UL transmissions. 
     
     
         48 . The wireless communication system of  claim 31 , wherein the DL time slots are separated by a time-domain guard interval, and wherein the UL time slots are separated by a time-domain guard interval. 
     
     
         49 . The wireless communication system of  claim 1 , wherein the wireless communication system comprises
 a terrestrial network, or   a non-terrestrial network, or   networks or segments of networks using as a receiver an airborne vehicle or a spaceborne vehicle, or   a combination thereof.   
     
     
         50 . The wireless communication system of  claim 1 , wherein
 the UE comprises one or more of:
 a mobile or stationary terminal, 
 an IoT device, 
 a ground based vehicle, 
 an aerial vehicle, 
 a drone, 
 a building, or 
 any other item or device provided with network connectivity enabling the item/device to communicate using the wireless communication system, like a sensor or actuator, and 
   the base station comprises one or more:
 a macro cell base station, or 
 a small cell base station, or 
 a spaceborne vehicle, like a satellite or a space, or 
 an airborne vehicle, like a unmanned aircraft system (UAS), e.g., a tethered UAS, a lighter than air UAS (LTA), a heavier than air UAS (HTA) and a high altitude UAS platforms (HAPs), or 
 any transmission/reception point (TRP) enabling an item or a device provided with network connectivity to communicate using the wireless communication system. 
   
     
     
         51 . The wireless communication system of  claim 1 , using an Inverse Fast Fourier Transform, IFFT, based signal, wherein the IFFT based signal comprises OFDM with CP, DFT-s-OFDM with CP, IFFT-based waveforms without CP, f-OFDM, FBMC, GFDM or UFMC. 
     
     
         52 . A wireless communication method for a wireless communication system comprising a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE, and at least one base station, the base station configured to serve the plurality of UEs, the method comprising:
 providing, by the base station, a plurality of beams or spatial links for a wireless communication with the plurality of UEs, the plurality of beams comprising at least a first beam or spatial link for a wireless communication with the first UE and a second beam or spatial link for a wireless communication with the second UE,   transmitting, by the base station, to the first UE on the first beam or spatial link using frequency resources within a DL frequency band,   transmitting, by the base station, to the second UE on the second beam or spatial link using frequency resources within the DL frequency band, wherein the DL frequency band and a UL frequency band overlap at least partially, the overlapping parts of the DL frequency band and the UL frequency band defining an overlapping frequency band,   concurrently transmitting and receiving, by the base station, in the overlapping frequency band, wherein one or more transmission signals are canceled by the base station at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the overlapping frequency band, and   transmitting to and receiving from the base station, by the first and second UEs, using respective frequency resources in the overlapping frequency band.   
     
     
         53 . A wireless communication method for a wireless communication system comprising a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE, and at least one base station, the base station configured to serve the plurality of UEs, the method comprising:
 transmitting, by the base station, to the first UE using a first DL subband of the DL frequency band,   transmitting, by the base station, to the second UE using a second DL subband of the DL frequency band, wherein the DL frequency band and a UL frequency band overlap at least partially, the overlapping parts of the DL frequency band and the UL frequency band defining an overlapping frequency band,   concurrently transmitting and receiving, by the base station, in the overlapping frequency band, wherein one or more transmission signals are canceled by the base station at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the overlapping frequency band,   transmitting, by the first and second UEs, to the base station using respective subbands in the overlapping frequency band,   transmitting, by the first UE, to the base station using a first UL subband in the overlapping frequency band, the first UL subband selected such a signal in the first DL subband is successfully received by the first UE, and   transmitting, by the second UE, to the base station using a second UL subband in the overlapping frequency band, the second UL subband selected such a signal in a second DL subband is successfully received by the second UE.   
     
     
         54 . A wireless communication method for a wireless communication system comprising a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE, and at least one base station, the base station configured to serve the plurality of UEs, the first UE and the second UE transmitting to and receiving from the base station using time resources within a TDD frequency band, the method comprising:
 providing, by the base station, a plurality of beams or spatial links for a wireless communication with the plurality of UEs, the plurality of beams comprising at least a first beam or spatial link for a wireless communication with the first UE and a second beam or spatial link for a wireless communication with the second UE,   transmitting, by the base station, to the first UE on the first beam or spatial link using one or more first DL time resources in the TDD frequency band,   transmitting, by the base station, to the second UE on the second beam or spatial link using one or more second DL time resources in the TDD frequency band,   concurrently transmitting and receiving, by the base station, in the overlapping frequency band, wherein one or more transmission signals are canceled by the base station at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the overlapping frequency band,   transmitting, by the first UE, to the base station using one or more first UL time resources in the TDD frequency band, a first UL time resource overlapping at least partially a second DL time resource in the TDD frequency band, and   transmitting, by the second UE, transmit to the base station using one or more second UL time resources in the overlapping frequency band, a second UL time resource overlapping at least partially a first DL time resource in the TDD frequency band.   
     
     
         55 . A wireless communication method for a wireless communication system comprising a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE, and at least one base station, the base station configured to serve the plurality of UEs, the first UE and the second UE transmitting to and receiving from the base station using a TDD frequency band, the method comprising:
 transmitting, by the base station, to the first UE using one or more first DL time slots in the TDD frequency band,   transmitting, by the base station, to the second UE using one or more second DL time slots in the TDD frequency band,   concurrently transmitting and receiving, by the base station, in the overlapping frequency band, wherein one or more transmission signals are canceled by the base station at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the overlapping frequency band,   transmitting, by the first UE, to the base station using one or more first UL time slots in the TDD frequency band, a first UL time slot overlapping at least partially a second time slot in the TDD frequency band,   transmitting, by the second UE, to the base station using one or more second UL time slots in the overlapping frequency band, a second UL time slot overlapping at least partially a first time slot in the DL frequency band, and   controlling antennas or an antenna array of the first UE so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a radiation towards the base station is stronger than a radiation towards the second UE, and/or controlling antennas or an antenna array of the second UE so as to set a receive beam pattern and/or a transmit beam pattern of the antenna such that a radiation towards the base station is stronger than a radiation towards the first UE.   
     
     
         56 . A non-transitory digital storage medium having stored thereon a computer program for performing a wireless communication method for a wireless communication system comprising a plurality of UEs, the plurality of UEs comprising at least a first UE and a second UE, and at least one base station, the base station configured to serve the plurality of UEs, the method comprising:
 providing, by the base station, a plurality of beams or spatial links for a wireless communication with the plurality of UEs, the plurality of beams comprising at least a first beam or spatial link for a wireless communication with the first UE and a second beam or spatial link for a wireless communication with the second UE,   transmitting, by the base station, to the first UE on the first beam or spatial link using frequency resources within a DL frequency band,   transmitting, by the base station, to the second UE on the second beam or spatial link using frequency resources within the DL frequency band, wherein the DL frequency band and a UL frequency band overlap at least partially, the overlapping parts of the DL frequency band and the UL frequency band defining an overlapping frequency band,   concurrently transmitting and receiving, by the base station, in the overlapping frequency band, wherein one or more transmission signals are canceled by the base station at least in presence of one or more concurrent receive signals from the first UE or from the second UE in the overlapping frequency band, and   transmitting to and receiving from the base station, by the first and second UEs, using respective frequency resources in the overlapping frequency band,   when said computer program is run by a computer.